I know for sure smoke is badly optimised, if you zoom into it FPS will drop down to like what feels like 5-15fps.
But overall it mostly runs pretty smoothly for me except in really really heavy fighting (like lots of units + planes & arty in small area) which doesn't last long and doesn't happen all that often.
On all max settings (including AA) I have min 26.00, avg 36.76 and max 52.32 FPS. i5 4590, 8GB Ram, R9 270X and 8.1 64 bit.
I do think the call in meta is getting very stale though.
I sense a ragequit after that shot, plus a balancethread 'Sturmtiger OP'
No he actually stayed lol, but we ended up winning after what turned into a crazy tank spam match. I brought my JT out right after that which helped a lot
I don't use it often, but sometimes if I can't watch over a unit because others I need to micro in a fight I will a-move squad to capping point or wherever to help a bit. Sometimes I use it for MGs too so they don't run straight into the enemy if I am not watching.